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Commit8f28789

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Rename BgWriterShmem/Request to CheckpointerShmem/Request
1 parentbbd3ec9 commit8f28789

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3 files changed

+56
-55
lines changed

3 files changed

+56
-55
lines changed

‎src/backend/postmaster/checkpointer.c‎

Lines changed: 51 additions & 51 deletions
Original file line numberDiff line numberDiff line change
@@ -110,7 +110,7 @@ typedef struct
110110
ForkNumberforknum;
111111
BlockNumbersegno;/* see md.c for special values */
112112
/* might add a real request-type field later; not needed yet */
113-
}BgWriterRequest;
113+
}CheckpointerRequest;
114114

115115
typedefstruct
116116
{
@@ -129,10 +129,10 @@ typedef struct
129129

130130
intnum_requests;/* current # of requests */
131131
intmax_requests;/* allocated array size */
132-
BgWriterRequestrequests[1];/* VARIABLE LENGTH ARRAY */
133-
}BgWriterShmemStruct;
132+
CheckpointerRequestrequests[1];/* VARIABLE LENGTH ARRAY */
133+
}CheckpointerShmemStruct;
134134

135-
staticBgWriterShmemStruct*BgWriterShmem;
135+
staticCheckpointerShmemStruct*CheckpointerShmem;
136136

137137
/* interval for calling AbsorbFsyncRequests in CheckpointWriteDelay */
138138
#defineWRITES_PER_ABSORB1000
@@ -195,7 +195,7 @@ CheckpointerMain(void)
195195
sigjmp_buflocal_sigjmp_buf;
196196
MemoryContextcheckpointer_context;
197197

198-
BgWriterShmem->checkpointer_pid=MyProcPid;
198+
CheckpointerShmem->checkpointer_pid=MyProcPid;
199199
am_checkpointer= true;
200200

201201
/*
@@ -302,7 +302,7 @@ CheckpointerMain(void)
302302
if (ckpt_active)
303303
{
304304
/* use volatile pointer to prevent code rearrangement */
305-
volatileBgWriterShmemStruct*bgs=BgWriterShmem;
305+
volatileCheckpointerShmemStruct*bgs=CheckpointerShmem;
306306

307307
SpinLockAcquire(&bgs->ckpt_lck);
308308
bgs->ckpt_failed++;
@@ -455,7 +455,7 @@ CheckpointerMain(void)
455455
booldo_restartpoint;
456456

457457
/* use volatile pointer to prevent code rearrangement */
458-
volatileBgWriterShmemStruct*bgs=BgWriterShmem;
458+
volatileCheckpointerShmemStruct*bgs=CheckpointerShmem;
459459

460460
/*
461461
* Check if we should perform a checkpoint or a restartpoint. As a
@@ -651,7 +651,7 @@ ImmediateCheckpointRequested(void)
651651
{
652652
if (checkpoint_requested)
653653
{
654-
volatileBgWriterShmemStruct*bgs=BgWriterShmem;
654+
volatileCheckpointerShmemStruct*bgs=CheckpointerShmem;
655655

656656
/*
657657
* We don't need to acquire the ckpt_lck in this case because we're
@@ -893,44 +893,44 @@ ReqShutdownHandler(SIGNAL_ARGS)
893893
*/
894894

895895
/*
896-
*BgWriterShmemSize
896+
*CheckpointerShmemSize
897897
*Compute space needed for bgwriter-related shared memory
898898
*/
899899
Size
900-
BgWriterShmemSize(void)
900+
CheckpointerShmemSize(void)
901901
{
902902
Sizesize;
903903

904904
/*
905905
* Currently, the size of the requests[] array is arbitrarily set equal to
906906
* NBuffers. This may prove too large or small ...
907907
*/
908-
size= offsetof(BgWriterShmemStruct,requests);
909-
size=add_size(size,mul_size(NBuffers,sizeof(BgWriterRequest)));
908+
size= offsetof(CheckpointerShmemStruct,requests);
909+
size=add_size(size,mul_size(NBuffers,sizeof(CheckpointerRequest)));
910910

911911
returnsize;
912912
}
913913

914914
/*
915-
*BgWriterShmemInit
915+
*CheckpointerShmemInit
916916
*Allocate and initialize bgwriter-related shared memory
917917
*/
918918
void
919-
BgWriterShmemInit(void)
919+
CheckpointerShmemInit(void)
920920
{
921921
boolfound;
922922

923-
BgWriterShmem= (BgWriterShmemStruct*)
923+
CheckpointerShmem= (CheckpointerShmemStruct*)
924924
ShmemInitStruct("Background Writer Data",
925-
BgWriterShmemSize(),
925+
CheckpointerShmemSize(),
926926
&found);
927927

928928
if (!found)
929929
{
930930
/* First time through, so initialize */
931-
MemSet(BgWriterShmem,0,sizeof(BgWriterShmemStruct));
932-
SpinLockInit(&BgWriterShmem->ckpt_lck);
933-
BgWriterShmem->max_requests=NBuffers;
931+
MemSet(CheckpointerShmem,0,sizeof(CheckpointerShmemStruct));
932+
SpinLockInit(&CheckpointerShmem->ckpt_lck);
933+
CheckpointerShmem->max_requests=NBuffers;
934934
}
935935
}
936936

@@ -955,7 +955,7 @@ void
955955
RequestCheckpoint(intflags)
956956
{
957957
/* use volatile pointer to prevent code rearrangement */
958-
volatileBgWriterShmemStruct*bgs=BgWriterShmem;
958+
volatileCheckpointerShmemStruct*bgs=CheckpointerShmem;
959959
intntries;
960960
intold_failed,
961961
old_started;
@@ -1006,7 +1006,7 @@ RequestCheckpoint(int flags)
10061006
*/
10071007
for (ntries=0;;ntries++)
10081008
{
1009-
if (BgWriterShmem->checkpointer_pid==0)
1009+
if (CheckpointerShmem->checkpointer_pid==0)
10101010
{
10111011
if (ntries >=20)/* max wait 2.0 sec */
10121012
{
@@ -1015,7 +1015,7 @@ RequestCheckpoint(int flags)
10151015
break;
10161016
}
10171017
}
1018-
elseif (kill(BgWriterShmem->checkpointer_pid,SIGINT)!=0)
1018+
elseif (kill(CheckpointerShmem->checkpointer_pid,SIGINT)!=0)
10191019
{
10201020
if (ntries >=20)/* max wait 2.0 sec */
10211021
{
@@ -1109,7 +1109,7 @@ bool
11091109
ForwardFsyncRequest(RelFileNodeBackendrnode,ForkNumberforknum,
11101110
BlockNumbersegno)
11111111
{
1112-
BgWriterRequest*request;
1112+
CheckpointerRequest*request;
11131113
booltoo_full;
11141114

11151115
if (!IsUnderPostmaster)
@@ -1121,35 +1121,35 @@ ForwardFsyncRequest(RelFileNodeBackend rnode, ForkNumber forknum,
11211121
LWLockAcquire(CheckpointerCommLock,LW_EXCLUSIVE);
11221122

11231123
/* Count all backend writes regardless of if they fit in the queue */
1124-
BgWriterShmem->num_backend_writes++;
1124+
CheckpointerShmem->num_backend_writes++;
11251125

11261126
/*
11271127
* If the checkpointer isn't running or the request queue is full,
11281128
* the backend will have to perform its own fsync request.But before
11291129
* forcing that to happen, we can try to compact the request queue.
11301130
*/
1131-
if (BgWriterShmem->checkpointer_pid==0||
1132-
(BgWriterShmem->num_requests >=BgWriterShmem->max_requests&&
1131+
if (CheckpointerShmem->checkpointer_pid==0||
1132+
(CheckpointerShmem->num_requests >=CheckpointerShmem->max_requests&&
11331133
!CompactCheckpointerRequestQueue()))
11341134
{
11351135
/*
11361136
* Count the subset of writes where backends have to do their own
11371137
* fsync
11381138
*/
1139-
BgWriterShmem->num_backend_fsync++;
1139+
CheckpointerShmem->num_backend_fsync++;
11401140
LWLockRelease(CheckpointerCommLock);
11411141
return false;
11421142
}
11431143

11441144
/* OK, insert request */
1145-
request=&BgWriterShmem->requests[BgWriterShmem->num_requests++];
1145+
request=&CheckpointerShmem->requests[CheckpointerShmem->num_requests++];
11461146
request->rnode=rnode;
11471147
request->forknum=forknum;
11481148
request->segno=segno;
11491149

11501150
/* If queue is more than half full, nudge the checkpointer to empty it */
1151-
too_full= (BgWriterShmem->num_requests >=
1152-
BgWriterShmem->max_requests /2);
1151+
too_full= (CheckpointerShmem->num_requests >=
1152+
CheckpointerShmem->max_requests /2);
11531153

11541154
LWLockRelease(CheckpointerCommLock);
11551155

@@ -1180,7 +1180,7 @@ CompactCheckpointerRequestQueue(void)
11801180
{
11811181
structBgWriterSlotMapping
11821182
{
1183-
BgWriterRequestrequest;
1183+
CheckpointerRequestrequest;
11841184
intslot;
11851185
};
11861186

@@ -1196,16 +1196,16 @@ CompactCheckpointerRequestQueue(void)
11961196

11971197
/* Initialize temporary hash table */
11981198
MemSet(&ctl,0,sizeof(ctl));
1199-
ctl.keysize=sizeof(BgWriterRequest);
1199+
ctl.keysize=sizeof(CheckpointerRequest);
12001200
ctl.entrysize=sizeof(structBgWriterSlotMapping);
12011201
ctl.hash=tag_hash;
12021202
htab=hash_create("CompactCheckpointerRequestQueue",
1203-
BgWriterShmem->num_requests,
1203+
CheckpointerShmem->num_requests,
12041204
&ctl,
12051205
HASH_ELEM |HASH_FUNCTION);
12061206

12071207
/* Initialize skip_slot array */
1208-
skip_slot=palloc0(sizeof(bool)*BgWriterShmem->num_requests);
1208+
skip_slot=palloc0(sizeof(bool)*CheckpointerShmem->num_requests);
12091209

12101210
/*
12111211
* The basic idea here is that a request can be skipped if it's followed
@@ -1220,13 +1220,13 @@ CompactCheckpointerRequestQueue(void)
12201220
* anyhow), but it's not clear that the extra complexity would buy us
12211221
* anything.
12221222
*/
1223-
for (n=0;n<BgWriterShmem->num_requests;++n)
1223+
for (n=0;n<CheckpointerShmem->num_requests;++n)
12241224
{
1225-
BgWriterRequest*request;
1225+
CheckpointerRequest*request;
12261226
structBgWriterSlotMapping*slotmap;
12271227
boolfound;
12281228

1229-
request=&BgWriterShmem->requests[n];
1229+
request=&CheckpointerShmem->requests[n];
12301230
slotmap=hash_search(htab,request,HASH_ENTER,&found);
12311231
if (found)
12321232
{
@@ -1247,16 +1247,16 @@ CompactCheckpointerRequestQueue(void)
12471247
}
12481248

12491249
/* We found some duplicates; remove them. */
1250-
for (n=0,preserve_count=0;n<BgWriterShmem->num_requests;++n)
1250+
for (n=0,preserve_count=0;n<CheckpointerShmem->num_requests;++n)
12511251
{
12521252
if (skip_slot[n])
12531253
continue;
1254-
BgWriterShmem->requests[preserve_count++]=BgWriterShmem->requests[n];
1254+
CheckpointerShmem->requests[preserve_count++]=CheckpointerShmem->requests[n];
12551255
}
12561256
ereport(DEBUG1,
12571257
(errmsg("compacted fsync request queue from %d entries to %d entries",
1258-
BgWriterShmem->num_requests,preserve_count)));
1259-
BgWriterShmem->num_requests=preserve_count;
1258+
CheckpointerShmem->num_requests,preserve_count)));
1259+
CheckpointerShmem->num_requests=preserve_count;
12601260

12611261
/* Cleanup. */
12621262
pfree(skip_slot);
@@ -1275,8 +1275,8 @@ CompactCheckpointerRequestQueue(void)
12751275
void
12761276
AbsorbFsyncRequests(void)
12771277
{
1278-
BgWriterRequest*requests=NULL;
1279-
BgWriterRequest*request;
1278+
CheckpointerRequest*requests=NULL;
1279+
CheckpointerRequest*request;
12801280
intn;
12811281

12821282
if (!am_checkpointer)
@@ -1298,19 +1298,19 @@ AbsorbFsyncRequests(void)
12981298
LWLockAcquire(CheckpointerCommLock,LW_EXCLUSIVE);
12991299

13001300
/* Transfer stats counts into pending pgstats message */
1301-
BgWriterStats.m_buf_written_backend+=BgWriterShmem->num_backend_writes;
1302-
BgWriterStats.m_buf_fsync_backend+=BgWriterShmem->num_backend_fsync;
1301+
BgWriterStats.m_buf_written_backend+=CheckpointerShmem->num_backend_writes;
1302+
BgWriterStats.m_buf_fsync_backend+=CheckpointerShmem->num_backend_fsync;
13031303

1304-
BgWriterShmem->num_backend_writes=0;
1305-
BgWriterShmem->num_backend_fsync=0;
1304+
CheckpointerShmem->num_backend_writes=0;
1305+
CheckpointerShmem->num_backend_fsync=0;
13061306

1307-
n=BgWriterShmem->num_requests;
1307+
n=CheckpointerShmem->num_requests;
13081308
if (n>0)
13091309
{
1310-
requests= (BgWriterRequest*)palloc(n*sizeof(BgWriterRequest));
1311-
memcpy(requests,BgWriterShmem->requests,n*sizeof(BgWriterRequest));
1310+
requests= (CheckpointerRequest*)palloc(n*sizeof(CheckpointerRequest));
1311+
memcpy(requests,CheckpointerShmem->requests,n*sizeof(CheckpointerRequest));
13121312
}
1313-
BgWriterShmem->num_requests=0;
1313+
CheckpointerShmem->num_requests=0;
13141314

13151315
LWLockRelease(CheckpointerCommLock);
13161316

‎src/backend/storage/ipc/ipci.c‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -119,7 +119,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
119119
size=add_size(size,SInvalShmemSize());
120120
size=add_size(size,PMSignalShmemSize());
121121
size=add_size(size,ProcSignalShmemSize());
122-
size=add_size(size,BgWriterShmemSize());
122+
size=add_size(size,CheckpointerShmemSize());
123123
size=add_size(size,AutoVacuumShmemSize());
124124
size=add_size(size,WalSndShmemSize());
125125
size=add_size(size,WalRcvShmemSize());
@@ -224,7 +224,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port)
224224
*/
225225
PMSignalShmemInit();
226226
ProcSignalShmemInit();
227-
BgWriterShmemInit();
227+
CheckpointerShmemInit();
228228
AutoVacuumShmemInit();
229229
WalSndShmemInit();
230230
WalRcvShmemInit();

‎src/include/postmaster/bgwriter.h‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -32,7 +32,8 @@ extern bool ForwardFsyncRequest(RelFileNodeBackend rnode, ForkNumber forknum,
3232
BlockNumbersegno);
3333
externvoidAbsorbFsyncRequests(void);
3434

35-
externSizeBgWriterShmemSize(void);
36-
externvoidBgWriterShmemInit(void);
35+
/* These were previously called BgWriterShmem... */
36+
externSizeCheckpointerShmemSize(void);
37+
externvoidCheckpointerShmemInit(void);
3738

3839
#endif/* _BGWRITER_H */

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